code: def main():
      parser = argparse.ArgumentParser()
      subcommands = parser.add_subparsers()
  
      cmd_list = subcommands.add_parser("list")
      cmd_list.set_defaults(action="list")
      _add_common_arguments(cmd_list)
      cmd_list.add_argument(
          "-l",
          "--list",
          action="store_true",
          help="Print more details.",
      )
  
      cmd_do = subcommands.add_parser("do")
      cmd_do.set_defaults(action="do")
      _add_common_arguments(cmd_do)
      cmd_do.add_argument(
          "action_type", type=str, help="The action type to run."
      )
  
      cmd_put = subcommands.add_parser("put")
      cmd_put.set_defaults(action="put")
      _add_common_arguments(cmd_put)
      cmd_put.add_argument("file", type=str, help="CSV file to upload.")
  
      cmd_get = subcommands.add_parser("get")
      cmd_get.set_defaults(action="get")
      _add_common_arguments(cmd_get)
      cmd_get_descriptor = cmd_get.add_mutually_exclusive_group(
          required=True
      )
      cmd_get_descriptor.add_argument(
          "-p",
          "--path",
          type=str,
          action="append",
          help="The path for the descriptor.",
      )
      cmd_get_descriptor.add_argument(
          "-c",
          "--command",
          type=str,
          help="The command for the descriptor.",
      )
  
      args = parser.parse_args()
      if not hasattr(args, "action"):
          parser.print_help()
          sys.exit(1)
  
      commands = {
          "list": list_flights,
          "do": do_action,
          "get": get_flight,
          "put": push_data,
      }
      host, port = args.host.split(":")
      port = int(port)
      scheme = "grpc+tcp"
      connection_args = {}
      if args.tls:
          scheme = "grpc+tls"
          if args.tls_roots:
              with open(args.tls_roots, "rb") as root_certs:
                  connection_args["tls_root_certs"] = root_certs.read()
      if args.mtls:
          with open(args.mtls[0], "rb") as cert_file:
              tls_cert_chain = cert_file.read()
          with open(args.mtls[1], "rb") as key_file:
              tls_private_key = key_file.read()
          connection_args["cert_chain"] = tls_cert_chain
          connection_args["private_key"] = tls_private_key
      client = pyarrow.flight.FlightClient(
          f"{scheme}://{host}:{port}", **connection_args
      )
      while True:
          try:
              action = pyarrow.flight.Action("healthcheck", b"")
              options = pyarrow.flight.FlightCallOptions(timeout=1)
              list(client.do_action(action, options=options))
              break
          except pyarrow.ArrowIOError as e:
              if "Deadline" in str(e):
                  print("Server is not ready, waiting...")
      commands[args.action](args, client, connection_args)
  
file_path: arrow/python/examples/flight/client.py
imports: import argparse
  import sys
  import pyarrow
  import pyarrow.flight
  import pyarrow.csv
label_desc: Use image node_id 6 for calling a global function with example usage: main() without return types